Vector-like quarks with a scalar triplet

Abstract

We study a minimal extension to the Standard Model with an additional real scalar triplet, $\Sigma$, and a single vector-like quark, $T$. This class of models appear naturally in extensions of the Littlest Higgs model that incorporate dark matter without the need of $T$-parity. We assume the limit that the triplet does not develop a vacuum expectation value and that all dimension five operators coupling the triplet to Standard Model fields and the vector-like quarks are characterized by the scale $\Lambda$ at which we expect new physics to arise. We introduce new non-renormalizable interactions between the new scalar sector and fermion sector that allow mixing between the Standard Model third generation up-type quark and the vector-like quark in a way that leads to the cancellation of the leading quadratic divergences to the one-loop corrections from the top quark to the mass of the Higgs boson. Within this framework, new decay modes of the vector-like quark to the real scalar triplet and SM particles arise and bring forth an opportunity to probe this model with existing and future LHC data. We contrast constraints from direct colliders searches with low energy precision measurements and find that heavy vector-like top quarks with a mass as low as $650$ GeV are consistent with current experimental constraints in models where new physics arises at scales below $2$ TeV.

References in corpus (59)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Precision Electroweak Measurements on the Z Resonance
• The Littlest Higgs
• Bulk Fields and Supersymmetry in a Slice of AdS
• Minimal Dark Matter
• Neutrino masses and mixings in non-factorizable geometry
• -- HATHOR -- HAdronic Top and Heavy quarks crOss section calculatoR
• Observation of a new boson with mass near 125 GeV in pp collisions at sqrt(s) = 7 and 8 TeV
• The Inert Doublet Model: an Archetype for Dark Matter
• A custodial symmetry for Zbb
• Light custodians in natural composite Higgs models
• RS1, Custodial Isospin and Precision Tests
• Model-independent constraints on Delta F=2 operators and the scale of New Physics
• Flavor Structure of Warped Extra Dimension Models
• Fermion Masses, Mixings and Proton Decay in a Randall-Sundrum Model
• The Electroweak Fit of the Standard Model after the Discovery of a New Boson at the LHC
• A handbook of vector-like quarks: mixing and single production
• Flavor Violating Higgs Decays
• Flavor violation and warped geometry
• Top Quarks and Electroweak Symmetry Breaking in Little Higgs Models
• Light Top Partners for a Light Composite Higgs
• Flavour-Changing Decays of a 125 GeV Higgs-like Particle
• Radiative Corrections to the $Zb\bar{b}$ Vertex and Constraints on Extended Higgs Sectors
• Baryon Number in Warped GUTs : Model Building and (Dark Matter Related) Phenomenology
• Measurement of the single-top-quark t-channel cross section in pp collisions at sqrt(s) = 7 TeV
• Effects of mixing with quark singlets
• The Inert Dark Matter
• Measurement of the t-channel single top-quark production cross section in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Inclusive search for a vector-like T quark with charge 2/3 in pp collisions at sqrt(s) = 8 TeV
• Triplet Scalars and Dark Matter at the LHC
• A Higgs Conundrum with Vector Fermions
• A Fermionic Top Partner: Naturalness and the LHC
• Light Higgs and Vector-like Quarks without Prejudice
• Precision observables in SU(2) x U(1) models with an additional Higgs triplet
• Radiative Neutrino Mass with Scotogenic Scalar Triplet
• Stabilizing Electroweak Vacuum in a Vector-like Fermion Model
• Search for flavor changing neutral currents via quark-gluon couplings in single top quark production using 2.3 fb^-1 of ppbar collisions
• Higgs Triplets and Limits from Precision Measurements
• (Non)decoupling of the Higgs triplet effects
• Mixing with vector-like quarks: constraints and expectations
• The Bestest Little Higgs
• The recent Higgs boson data and Higgs triplet model with vectorlike quarks
• Framework for Model Independent Analyses of Multiple Extra Quark Scenarios
• Higgs mass bounds in a Triplet Model
• The Hunt for New Physics in the Flavour Sector with up vector-like quarks
• Mass bounds in a model with a Triplet Higgs
• Vector-like Bottom Quarks in Composite Higgs Models
• Searching for $t\to ch$ with Multi-Leptons
• Search for a Heavy Top-Like Quark in p\bar{p} Collisions at {\surd}s = 1.96 TeV
• Low-Energy Effective Theory, Unitarity, and Non-Decoupling Behavior in a Model with Heavy Higgs-Triplet Fields
• Next-to-Leading Order Cross Sections for New Heavy Fermion Production at Hadron Colliders
• BR(Bs to mu+ mu-) as an electroweak precision test
• Exotic Top Partners and Little Higgs
• T-parity, its problems and their solution
• Top Partner Probes of Extended Higgs Sectors
• New signals for singlet Higgs and vector-like quarks at the LHC
• LHC diphoton and Z+photon Higgs signals in the Higgs triplet model with Y=0
• Vector Quarks in the Higgs Triplet Model
• Darkening the Little Higgs

Cited by in corpus (6)

• Beyond the Minimal Top Partner Decay
• Odd Top Partners at the LHC
• Implications of a High-Mass Diphoton Resonance for Heavy Quark Searches
• Electroweak Baryogenesis with Vector-like Leptons and Scalar Singlets
• Impact of Yukawa-like dimension-5 operators on the Georgi-Machacek model
• The Muon Magnetic Moment and Physics Beyond the Standard Model